LI Shuo,SHEN Zhanfeng,KE Yingming,et al.Spatial-Temporal Variation and Driving Forces of Land Use Types in the Daqing River Basin from 1974 to 2019[J].Research of Soil and Water Conservation,2021,28(01):195-203.
1974—2019年大清河流域土地利用景观时空变化
- Title:
- Spatial-Temporal Variation and Driving Forces of Land Use Types in the Daqing River Basin from 1974 to 2019
- 文章编号:
- 1005-3409(2021)01-0195-09
- Keywords:
- Daqing River; remote sensing; Landsat; land use type; driving force; farmland; construction land
- 分类号:
- TP79
- 文献标志码:
- A
- 摘要:
- 为探究大清河流域46年来土地利用类型的时空演变及驱动力影响,利用1974—2019年间8期Landsat卫星影像,从面积变化、类型转换、景观指数3个角度分析大清河流域土地利用变化特征,并从自然环境和社会经济2方面讨论土地利用类型变化的驱动力影响。研究表明:(1)1974—2019年建设用地持续增加,耕地、水域面积先增后减,林地面积先减小后增大,未利用地与草地面积波动较小,土地利用类型转换程度逐渐缓和。(2)建设用地在平原地区的中心城市周边加速扩张,年增长率约为5%,主要流入类型为耕地、草地与未利用地。(3)耕地面积先增加后减少,由单向转入变为双向流转。在1974年之后,因为人口扩张,降水减少等因素,耕地在太行山东麓扩张约4 866 km2。1988年之后因城镇化建设原因,耕地每年以4.97%的速度锐减,在2001年受退耕还林还草政策的影响,林地、草地面积分别增加1 390 km2,2 435 km2。(4)耕地进入双向流转时期后,以河北省为例,转出面积约10 252 km2,同样存在耕地转入7 569 km2,耕地保护政策极大地缓和了建设用地与耕地的冲突。
- Abstract:
- In order to explore the land use types and driving forces in the Daqing River Basin for 46 years, the eighth Landsat satellite image of 1978—2019 was used. From the perspectives of area change, type change and landscape pattern change, the spatial-temporal changes of land use in the Daqing River Basin in 46 years were analyzed, and the driving forces of land change types were explained from the aspects of natural environment and socio-economic aspects. The results show that:(1)during 1974—2019, the built-up areas increased continuously, the cultivated land and water area were increasing in the former years and then decreasing in the latter years, while the forest areas were performing the opposite trend; the unutilized land and grassland kept steadily, the intensity of land use changes kept stable after dramatic changes;(2)in the plain area, built-up areas around the central city expanded correspondingly in a rapid rate, and the annual growth rate was about 5%; farmland, grassland and unutilized land were the main inward land types used for the built-up area;(3)the cultivated land area was increasing in the former years and then decreasing in the latter years, the overall cultivated land transformations had shifted from single inward transformation to outward and inward transformations; after 1974, because of population expansion, precipitation reduction and other factors, the cultivated land expanded about 4 866 km2 in the eastern foot of Taihang Mountain; after 1988, considering the urbanization, the cultivated land was decreasing sharply at the rate of 4.97% every year; in 2001, because of the policy of returning farmland to forest and grassland, the forest areas and grassland increased by 1 390 km2 and 2 435 km2, respectively;(4)after the overall cultivated land transformations had been outward and inward transformations, for example, Hebei Province, the area of inward land types was about 10 252 km2, and the outward area was 7 569 km2. The policy of cultivated land protection plays an important role to resolve the conflict between construction land and cultivated land.
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备注/Memo
收稿日期:2020-03-29 修回日期:2020-05-01
资助项目:国家重点研发计划项目(2017YFB0504204,2018YFB0505000,2016YFC0803109); 国家自然科学基金(41971375,41671034); 2018年新疆维吾尔族自治区柔性引进人才项目
第一作者:李硕(1994—),男(回族),河南新乡人,硕士研究生,研究方向为遥感信息提取。E-mail:lishuo191@mails.ucas.ac.cn
通信作者:沈占锋(1977—),男,黑龙江大庆人,博士,研究员,研究方向为遥感信息计算。E-mail:shenzf@radi.ac.cn